Trillium rivale S. Watson
[= Pseudotrillium rivale]
Annotated by Linda Jennings, Daniel Mosquin, Brent Hine, Wendy DesCamp, Randall Hitchin, 2008.

Oregon: Siskiyou National Forest, along Forest Service Road 4201. Elev. 2906 ft
42.246° N, 123.7239° W,
Datum: Unknown. Coordinate Source: Verbatim from Collector/Sheet.
Growing on north facing 45 degree slope on south side of road, exposed, rocky serpentine scree slope, site burned by 2002 Biscuit fire; associated species include Umbellularia californica, Calocedrus decurrens, Pinus jeffreyi, Arbutus menziesii, Pseudotsuga menziesii, Maianthemum racemosum, Cardamine nuttallii var. nuttallii, Rosa sp., Poaceae sp., Salix sp., Carex sp. and Cerastium aff. arvense. Scattered and locally abundant perennial, 90% flowering; flowers white, leaves gray green with silver gray venation.

Linda Jennings 25, 2008 May 06
With Daniel Mosquin, Brent Hine, Wendy DesCamp, Randall Hitchin
UBC, Accession: V241462